Loopback Tests - Multitech MultiModem DSVD MT5600DSVD User Manual

Data/fax/voice modem

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MultiModemDSVD User Guide

3. Type the escape sequence +++AT and press E

4. Type AT&T3 and press E

5. Have someone enter data from the remote keyboard. For this test, typing multiple

6. To exit the test, turn off the modems.

online command mode.

dem (if responses are enabled), your modem is placed in digital loopback mode.

uppercase U characters is a good way to send an alternating test pattern of binary

ones and zeros. The data received by your modem enters its analog receiver, is

converted to digital data, is reconverted into analog, and then is transmitted

back to the remote modem. Your modem passes this test if the characters re-

ceived on the remote monitor are the same as those entered from the remote

keyboard.

NTER

. Once you receive an OK message from your mo-

NTER

C Loopback Tests

to bring your modem into

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